/*!
 * iScroll v4.2.5 ~ Copyright (c) 2012 Matteo Spinelli, http://cubiq.org
 * Released under MIT license, http://cubiq.org/license
 */
define(function(require, exports, module) {
    (function (window, doc) {
        var m = Math,
            dummyStyle = doc.createElement('div').style,
            vendor = (function () {
                var vendors = 't,webkitT,MozT,msT,OT'.split(','),
                    t,
                    i = 0,
                    l = vendors.length;

                for (; i < l; i++) {
                    t = vendors[i] + 'ransform';
                    if (t in dummyStyle) {
                        return vendors[i].substr(0, vendors[i].length - 1);
                    }
                }

                return false;
            })(),
            cssVendor = vendor ? '-' + vendor.toLowerCase() + '-' : '',

        // Style properties
            transform = prefixStyle('transform'),
            transitionProperty = prefixStyle('transitionProperty'),
            transitionDuration = prefixStyle('transitionDuration'),
            transformOrigin = prefixStyle('transformOrigin'),
            transitionTimingFunction = prefixStyle('transitionTimingFunction'),
            transitionDelay = prefixStyle('transitionDelay'),

        // Browser capabilities
            isAndroid = (/android/gi).test(navigator.appVersion),
            isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
            isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),

            has3d = prefixStyle('perspective') in dummyStyle,
            hasTouch = 'ontouchstart' in window && !isTouchPad,
            hasTransform = vendor !== false,
            hasTransitionEnd = prefixStyle('transition') in dummyStyle,

            RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',
            START_EV = hasTouch ? 'touchstart' : 'mousedown',
            MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',
            END_EV = hasTouch ? 'touchend' : 'mouseup',
            CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',
            TRNEND_EV = (function () {
                if (vendor === false) return false;

                var transitionEnd = {
                    '': 'transitionend',
                    'webkit': 'webkitTransitionEnd',
                    'Moz': 'transitionend',
                    'O': 'otransitionend',
                    'ms': 'MSTransitionEnd'
                };

                return transitionEnd[vendor];
            })(),

            nextFrame = (function () {
                return window.requestAnimationFrame ||
                    window.webkitRequestAnimationFrame ||
                    window.mozRequestAnimationFrame ||
                    window.oRequestAnimationFrame ||
                    window.msRequestAnimationFrame ||
                    function (callback) {
                        return setTimeout(callback, 1);
                    };
            })(),
            cancelFrame = (function () {
                return window.cancelRequestAnimationFrame ||
                    window.webkitCancelAnimationFrame ||
                    window.webkitCancelRequestAnimationFrame ||
                    window.mozCancelRequestAnimationFrame ||
                    window.oCancelRequestAnimationFrame ||
                    window.msCancelRequestAnimationFrame ||
                    clearTimeout;
            })(),

        // Helpers
            translateZ = has3d ? ' translateZ(0)' : '',

        // Constructor
            iScroll = function (el, options) {
                var that = this,
                    i;

                that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
                that.wrapper.style.overflow = 'hidden';
                that.scroller = that.wrapper.children[0];

                // Default options
                that.options = {
                    hScroll: true,
                    vScroll: true,
                    x: 0,
                    y: 0,
                    bounce: true,
                    bounceLock: false,
                    momentum: true,
                    lockDirection: true,
                    useTransform: true,
                    useTransition: false,
                    topOffset: 0,
                    checkDOMChanges: false,		// Experimental
                    handleClick: true,

                    // Scrollbar
                    hScrollbar: true,
                    vScrollbar: true,
                    fixedScrollbar: isAndroid,
                    hideScrollbar: isIDevice,
                    fadeScrollbar: isIDevice && has3d,
                    scrollbarClass: '',

                    // Zoom
                    zoom: false,
                    zoomMin: 1,
                    zoomMax: 4,
                    doubleTapZoom: 2,
                    wheelAction: 'scroll',

                    // Snap
                    snap: false,
                    snapThreshold: 1,

                    // Events
                    onRefresh: null,
                    onBeforeScrollStart: function (e) {
                        e.preventDefault();
                    },
                    onScrollStart: null,
                    onBeforeScrollMove: null,
                    onScrollMove: null,
                    onBeforeScrollEnd: null,
                    onScrollEnd: null,
                    onTouchEnd: null,
                    onDestroy: null,
                    onZoomStart: null,
                    onZoom: null,
                    onZoomEnd: null
                };

                // User defined options
                for (i in options) that.options[i] = options[i];

                // Set starting position
                that.x = that.options.x;
                that.y = that.options.y;

                // Normalize options
                that.options.useTransform = hasTransform && that.options.useTransform;
                that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
                that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
                that.options.zoom = that.options.useTransform && that.options.zoom;
                that.options.useTransition = hasTransitionEnd && that.options.useTransition;

                // Helpers FIX ANDROID BUG!
                // translate3d and scale doesn't work together!
                // Ignoring 3d ONLY WHEN YOU SET that.options.zoom
                if (that.options.zoom && isAndroid) {
                    translateZ = '';
                }

                // Set some default styles
                that.scroller.style[transitionProperty] = that.options.useTransform ? cssVendor + 'transform' : 'top left';
                that.scroller.style[transitionDuration] = '0';
                that.scroller.style[transformOrigin] = '0 0';
                if (that.options.useTransition) that.scroller.style[transitionTimingFunction] = 'cubic-bezier(0.33,0.66,0.66,1)';

                if (that.options.useTransform) that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px)' + translateZ;
                else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';

                if (that.options.useTransition) that.options.fixedScrollbar = true;

                that.refresh();

                that._bind(RESIZE_EV, window);
                that._bind(START_EV);
                if (!hasTouch) {
                    if (that.options.wheelAction != 'none') {
                        that._bind('DOMMouseScroll');
                        that._bind('mousewheel');
                    }
                }

                if (that.options.checkDOMChanges) that.checkDOMTime = setInterval(function () {
                    that._checkDOMChanges();
                }, 500);
            };

// Prototype
        iScroll.prototype = {
            enabled: true,
            x: 0,
            y: 0,
            steps: [],
            scale: 1,
            currPageX: 0, currPageY: 0,
            pagesX: [], pagesY: [],
            aniTime: null,
            wheelZoomCount: 0,

            handleEvent: function (e) {
                var that = this;
                switch (e.type) {
                    case START_EV:
                        if (!hasTouch && e.button !== 0) return;
                        that._start(e);
                        break;
                    case MOVE_EV:
                        that._move(e);
                        break;
                    case END_EV:
                    case CANCEL_EV:
                        that._end(e);
                        break;
                    case RESIZE_EV:
                        that._resize();
                        break;
                    case 'DOMMouseScroll':
                    case 'mousewheel':
                        that._wheel(e);
                        break;
                    case TRNEND_EV:
                        that._transitionEnd(e);
                        break;
                }
            },

            _checkDOMChanges: function () {
                if (this.moved || this.zoomed || this.animating ||
                    (this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this.scale)) return;

                this.refresh();
            },

            _scrollbar: function (dir) {
                var that = this,
                    bar;

                if (!that[dir + 'Scrollbar']) {
                    if (that[dir + 'ScrollbarWrapper']) {
                        if (hasTransform) that[dir + 'ScrollbarIndicator'].style[transform] = '';
                        that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']);
                        that[dir + 'ScrollbarWrapper'] = null;
                        that[dir + 'ScrollbarIndicator'] = null;
                    }

                    return;
                }

                if (!that[dir + 'ScrollbarWrapper']) {
                    // Create the scrollbar wrapper
                    bar = doc.createElement('div');

                    if (that.options.scrollbarClass) bar.className = that.options.scrollbarClass + dir.toUpperCase();
                    else bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ? 'height:7px;bottom:1px;left:2px;right:' + (that.vScrollbar ? '7' : '2') + 'px' : 'width:7px;bottom:' + (that.hScrollbar ? '7' : '2') + 'px;top:2px;right:1px');

                    bar.style.cssText += ';pointer-events:none;' + cssVendor + 'transition-property:opacity;' + cssVendor + 'transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options.hideScrollbar ? '0' : '1');

                    that.wrapper.appendChild(bar);
                    that[dir + 'ScrollbarWrapper'] = bar;

                    // Create the scrollbar indicator
                    bar = doc.createElement('div');
                    if (!that.options.scrollbarClass) {
                        bar.style.cssText = 'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);' + cssVendor + 'background-clip:padding-box;' + cssVendor + 'box-sizing:border-box;' + (dir == 'h' ? 'height:100%' : 'width:100%') + ';' + cssVendor + 'border-radius:3px;border-radius:3px';
                    }
                    bar.style.cssText += ';pointer-events:none;' + cssVendor + 'transition-property:' + cssVendor + 'transform;' + cssVendor + 'transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);' + cssVendor + 'transition-duration:0;' + cssVendor + 'transform: translate(0,0)' + translateZ;
                    if (that.options.useTransition) bar.style.cssText += ';' + cssVendor + 'transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)';

                    that[dir + 'ScrollbarWrapper'].appendChild(bar);
                    that[dir + 'ScrollbarIndicator'] = bar;
                }

                if (dir == 'h') {
                    that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
                    that.hScrollbarIndicatorSize = m.max(m.round(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);
                    that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px';
                    that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;
                    that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;
                } else {
                    that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
                    that.vScrollbarIndicatorSize = m.max(m.round(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);
                    that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px';
                    that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;
                    that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;
                }

                // Reset position
                that._scrollbarPos(dir, true);
            },

            _resize: function () {
                var that = this;
                setTimeout(function () {
                    that.refresh();
                }, isAndroid ? 200 : 0);
            },

            _pos: function (x, y) {
                if (this.zoomed) return;

                x = this.hScroll ? x : 0;
                y = this.vScroll ? y : 0;

                if (this.options.useTransform) {
                    this.scroller.style[transform] = 'translate(' + x + 'px,' + y + 'px) scale(' + this.scale + ')' + translateZ;
                } else {
                    x = m.round(x);
                    y = m.round(y);
                    this.scroller.style.left = x + 'px';
                    this.scroller.style.top = y + 'px';
                }

                this.x = x;
                this.y = y;

                this._scrollbarPos('h');
                this._scrollbarPos('v');
            },

            _scrollbarPos: function (dir, hidden) {
                var that = this,
                    pos = dir == 'h' ? that.x : that.y,
                    size;

                if (!that[dir + 'Scrollbar']) return;

                pos = that[dir + 'ScrollbarProp'] * pos;

                if (pos < 0) {
                    if (!that.options.fixedScrollbar) {
                        size = that[dir + 'ScrollbarIndicatorSize'] + m.round(pos * 3);
                        if (size < 8) size = 8;
                        that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';
                    }
                    pos = 0;
                } else if (pos > that[dir + 'ScrollbarMaxScroll']) {
                    if (!that.options.fixedScrollbar) {
                        size = that[dir + 'ScrollbarIndicatorSize'] - m.round((pos - that[dir + 'ScrollbarMaxScroll']) * 3);
                        if (size < 8) size = 8;
                        that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';
                        pos = that[dir + 'ScrollbarMaxScroll'] + (that[dir + 'ScrollbarIndicatorSize'] - size);
                    } else {
                        pos = that[dir + 'ScrollbarMaxScroll'];
                    }
                }

                that[dir + 'ScrollbarWrapper'].style[transitionDelay] = '0';
                that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';
                that[dir + 'ScrollbarIndicator'].style[transform] = 'translate(' + (dir == 'h' ? pos + 'px,0)' : '0,' + pos + 'px)') + translateZ;
            },

            _start: function (e) {
                var that = this,
                    point = hasTouch ? e.touches[0] : e,
                    matrix, x, y,
                    c1, c2;

                if (!that.enabled) return;

                if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);

                if (that.options.useTransition || that.options.zoom) that._transitionTime(0);

                that.moved = false;
                that.animating = false;
                that.zoomed = false;
                that.distX = 0;
                that.distY = 0;
                that.absDistX = 0;
                that.absDistY = 0;
                that.dirX = 0;
                that.dirY = 0;

                // Gesture start
                if (that.options.zoom && hasTouch && e.touches.length > 1) {
                    c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
                    c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
                    that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);

                    that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;
                    that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;

                    if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
                }

                if (that.options.momentum) {
                    if (that.options.useTransform) {
                        // Very lame general purpose alternative to CSSMatrix
                        matrix = getComputedStyle(that.scroller, null)[transform].replace(/[^0-9\-.,]/g, '').split(',');
                        x = +(matrix[12] || matrix[4]);
                        y = +(matrix[13] || matrix[5]);
                    } else {
                        x = +getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '');
                        y = +getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '');
                    }

                    if (x != that.x || y != that.y) {
                        if (that.options.useTransition) that._unbind(TRNEND_EV);
                        else cancelFrame(that.aniTime);
                        that.steps = [];
                        that._pos(x, y);
                        if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);
                    }
                }

                that.absStartX = that.x;	// Needed by snap threshold
                that.absStartY = that.y;

                that.startX = that.x;
                that.startY = that.y;
                that.pointX = point.pageX;
                that.pointY = point.pageY;

                that.startTime = e.timeStamp || Date.now();

                if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);

                that._bind(MOVE_EV, window);
                that._bind(END_EV, window);
                that._bind(CANCEL_EV, window);
            },

            _move: function (e) {
                var that = this,
                    point = hasTouch ? e.touches[0] : e,
                    deltaX = point.pageX - that.pointX,
                    deltaY = point.pageY - that.pointY,
                    newX = that.x + deltaX,
                    newY = that.y + deltaY,
                    c1, c2, scale,
                    timestamp = e.timeStamp || Date.now();

                if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);

                // Zoom
                if (that.options.zoom && hasTouch && e.touches.length > 1) {
                    c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
                    c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
                    that.touchesDist = m.sqrt(c1 * c1 + c2 * c2);

                    that.zoomed = true;

                    scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;

                    if (scale < that.options.zoomMin) scale = 0.5 * that.options.zoomMin * Math.pow(2.0, scale / that.options.zoomMin);
                    else if (scale > that.options.zoomMax) scale = 2.0 * that.options.zoomMax * Math.pow(0.5, that.options.zoomMax / scale);

                    that.lastScale = scale / this.scale;

                    newX = this.originX - this.originX * that.lastScale + this.x;
                    newY = this.originY - this.originY * that.lastScale + this.y;

                    this.scroller.style[transform] = 'translate(' + newX + 'px,' + newY + 'px) scale(' + scale + ')' + translateZ;

                    if (that.options.onZoom) that.options.onZoom.call(that, e);
                    return;
                }

                that.pointX = point.pageX;
                that.pointY = point.pageY;

                // Slow down if outside of the boundaries
                if (newX > 0 || newX < that.maxScrollX) {
                    newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
                }
                if (newY > that.minScrollY || newY < that.maxScrollY) {
                    newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY : that.maxScrollY;
                }

                that.distX += deltaX;
                that.distY += deltaY;
                that.absDistX = m.abs(that.distX);
                that.absDistY = m.abs(that.distY);

                if (that.absDistX < 6 && that.absDistY < 6) {
                    return;
                }

                // Lock direction
                if (that.options.lockDirection) {
                    if (that.absDistX > that.absDistY + 5) {
                        newY = that.y;
                        deltaY = 0;
                    } else if (that.absDistY > that.absDistX + 5) {
                        newX = that.x;
                        deltaX = 0;
                    }
                }

                that.moved = true;
                that._pos(newX, newY);
                that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
                that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;

                if (timestamp - that.startTime > 300) {
                    that.startTime = timestamp;
                    that.startX = that.x;
                    that.startY = that.y;
                }

                if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
            },

            _end: function (e) {
                if (hasTouch && e.touches.length !== 0) return;

                var that = this,
                    point = hasTouch ? e.changedTouches[0] : e,
                    target, ev,
                    momentumX = { dist: 0, time: 0 },
                    momentumY = { dist: 0, time: 0 },
                    duration = (e.timeStamp || Date.now()) - that.startTime,
                    newPosX = that.x,
                    newPosY = that.y,
                    distX, distY,
                    newDuration,
                    snap,
                    scale;

                that._unbind(MOVE_EV, window);
                that._unbind(END_EV, window);
                that._unbind(CANCEL_EV, window);

                if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);

                if (that.zoomed) {
                    scale = that.scale * that.lastScale;
                    scale = Math.max(that.options.zoomMin, scale);
                    scale = Math.min(that.options.zoomMax, scale);
                    that.lastScale = scale / that.scale;
                    that.scale = scale;

                    that.x = that.originX - that.originX * that.lastScale + that.x;
                    that.y = that.originY - that.originY * that.lastScale + that.y;

                    that.scroller.style[transitionDuration] = '200ms';
                    that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px) scale(' + that.scale + ')' + translateZ;

                    that.zoomed = false;
                    that.refresh();

                    if (that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
                    return;
                }

                if (!that.moved) {
                    if (hasTouch) {
                        if (that.doubleTapTimer && that.options.zoom) {
                            // Double tapped
                            clearTimeout(that.doubleTapTimer);
                            that.doubleTapTimer = null;
                            if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
                            that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);
                            if (that.options.onZoomEnd) {
                                setTimeout(function () {
                                    that.options.onZoomEnd.call(that, e);
                                }, 200); // 200 is default zoom duration
                            }
                        } else if (this.options.handleClick) {
                            that.doubleTapTimer = setTimeout(function () {
                                that.doubleTapTimer = null;

                                // Find the last touched element
                                target = point.target;
                                while (target.nodeType != 1) target = target.parentNode;

                                if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
                                    ev = doc.createEvent('MouseEvents');
                                    ev.initMouseEvent('click', true, true, e.view, 1,
                                        point.screenX, point.screenY, point.clientX, point.clientY,
                                        e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
                                        0, null);
                                    ev._fake = true;
                                    target.dispatchEvent(ev);
                                }
                            }, that.options.zoom ? 250 : 0);
                        }
                    }

                    that._resetPos(400);

                    if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
                    return;
                }

                if (duration < 300 && that.options.momentum) {
                    momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
                    momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y - that.minScrollY : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;

                    newPosX = that.x + momentumX.dist;
                    newPosY = that.y + momentumY.dist;

                    if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = { dist: 0, time: 0 };
                    if ((that.y > that.minScrollY && newPosY > that.minScrollY) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) momentumY = { dist: 0, time: 0 };
                }

                if (momentumX.dist || momentumY.dist) {
                    newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);

                    // Do we need to snap?
                    if (that.options.snap) {
                        distX = newPosX - that.absStartX;
                        distY = newPosY - that.absStartY;
                        if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) {
                            that.scrollTo(that.absStartX, that.absStartY, 200);
                        }
                        else {
                            snap = that._snap(newPosX, newPosY);
                            newPosX = snap.x;
                            newPosY = snap.y;
                            newDuration = m.max(snap.time, newDuration);
                        }
                    }

                    that.scrollTo(m.round(newPosX), m.round(newPosY), newDuration);

                    if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
                    return;
                }

                // Do we need to snap?
                if (that.options.snap) {
                    distX = newPosX - that.absStartX;
                    distY = newPosY - that.absStartY;
                    if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) that.scrollTo(that.absStartX, that.absStartY, 200);
                    else {
                        snap = that._snap(that.x, that.y);
                        if (snap.x != that.x || snap.y != that.y) that.scrollTo(snap.x, snap.y, snap.time);
                    }

                    if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
                    return;
                }

                that._resetPos(200);
                if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
            },

            _resetPos: function (time) {
                var that = this,
                    resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
                    resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;

                if (resetX == that.x && resetY == that.y) {
                    if (that.moved) {
                        that.moved = false;
                        if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);		// Execute custom code on scroll end
                    }

                    if (that.hScrollbar && that.options.hideScrollbar) {
                        if (vendor == 'webkit') that.hScrollbarWrapper.style[transitionDelay] = '300ms';
                        that.hScrollbarWrapper.style.opacity = '0';
                    }
                    if (that.vScrollbar && that.options.hideScrollbar) {
                        if (vendor == 'webkit') that.vScrollbarWrapper.style[transitionDelay] = '300ms';
                        that.vScrollbarWrapper.style.opacity = '0';
                    }

                    return;
                }

                that.scrollTo(resetX, resetY, time || 0);
            },

            _wheel: function (e) {
                var that = this,
                    wheelDeltaX, wheelDeltaY,
                    deltaX, deltaY,
                    deltaScale;

                if ('wheelDeltaX' in e) {
                    wheelDeltaX = e.wheelDeltaX / 12;
                    wheelDeltaY = e.wheelDeltaY / 12;
                } else if ('wheelDelta' in e) {
                    wheelDeltaX = wheelDeltaY = e.wheelDelta / 12;
                } else if ('detail' in e) {
                    wheelDeltaX = wheelDeltaY = -e.detail * 3;
                } else {
                    return;
                }

                if (that.options.wheelAction == 'zoom') {
                    deltaScale = that.scale * Math.pow(2, 1 / 3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0));
                    if (deltaScale < that.options.zoomMin) deltaScale = that.options.zoomMin;
                    if (deltaScale > that.options.zoomMax) deltaScale = that.options.zoomMax;

                    if (deltaScale != that.scale) {
                        if (!that.wheelZoomCount && that.options.onZoomStart) that.options.onZoomStart.call(that, e);
                        that.wheelZoomCount++;

                        that.zoom(e.pageX, e.pageY, deltaScale, 400);

                        setTimeout(function () {
                            that.wheelZoomCount--;
                            if (!that.wheelZoomCount && that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
                        }, 400);
                    }

                    return;
                }

                deltaX = that.x + wheelDeltaX;
                deltaY = that.y + wheelDeltaY;

                if (deltaX > 0) deltaX = 0;
                else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;

                if (deltaY > that.minScrollY) deltaY = that.minScrollY;
                else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;

                if (that.maxScrollY < 0) {
                    that.scrollTo(deltaX, deltaY, 0);
                }
            },

            _transitionEnd: function (e) {
                var that = this;

                if (e.target != that.scroller) return;

                that._unbind(TRNEND_EV);

                that._startAni();
            },


            /**
             *
             * Utilities
             *
             */
            _startAni: function () {
                var that = this,
                    startX = that.x, startY = that.y,
                    startTime = Date.now(),
                    step, easeOut,
                    animate;

                if (that.animating) return;

                if (!that.steps.length) {
                    that._resetPos(400);
                    return;
                }

                step = that.steps.shift();

                if (step.x == startX && step.y == startY) step.time = 0;

                that.animating = true;
                that.moved = true;

                if (that.options.useTransition) {
                    that._transitionTime(step.time);
                    that._pos(step.x, step.y);
                    that.animating = false;
                    if (step.time) that._bind(TRNEND_EV);
                    else that._resetPos(0);
                    return;
                }

                animate = function () {
                    var now = Date.now(),
                        newX, newY;

                    if (now >= startTime + step.time) {
                        that._pos(step.x, step.y);
                        that.animating = false;
                        if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that);			// Execute custom code on animation end
                        that._startAni();
                        return;
                    }

                    now = (now - startTime) / step.time - 1;
                    easeOut = m.sqrt(1 - now * now);
                    newX = (step.x - startX) * easeOut + startX;
                    newY = (step.y - startY) * easeOut + startY;
                    that._pos(newX, newY);
                    if (that.animating) that.aniTime = nextFrame(animate);
                };

                animate();
            },

            _transitionTime: function (time) {
                time += 'ms';
                this.scroller.style[transitionDuration] = time;
                if (this.hScrollbar) this.hScrollbarIndicator.style[transitionDuration] = time;
                if (this.vScrollbar) this.vScrollbarIndicator.style[transitionDuration] = time;
            },

            _momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
                var deceleration = 0.0006,
                    speed = m.abs(dist) / time,
                    newDist = (speed * speed) / (2 * deceleration),
                    newTime = 0, outsideDist = 0;

                // Proportinally reduce speed if we are outside of the boundaries
                if (dist > 0 && newDist > maxDistUpper) {
                    outsideDist = size / (6 / (newDist / speed * deceleration));
                    maxDistUpper = maxDistUpper + outsideDist;
                    speed = speed * maxDistUpper / newDist;
                    newDist = maxDistUpper;
                } else if (dist < 0 && newDist > maxDistLower) {
                    outsideDist = size / (6 / (newDist / speed * deceleration));
                    maxDistLower = maxDistLower + outsideDist;
                    speed = speed * maxDistLower / newDist;
                    newDist = maxDistLower;
                }

                newDist = newDist * (dist < 0 ? -1 : 1);
                newTime = speed / deceleration;

                return { dist: newDist, time: m.round(newTime) };
            },

            _offset: function (el) {
                var left = -el.offsetLeft,
                    top = -el.offsetTop;

                while (el = el.offsetParent) {
                    left -= el.offsetLeft;
                    top -= el.offsetTop;
                }

                if (el != this.wrapper) {
                    left *= this.scale;
                    top *= this.scale;
                }

                return { left: left, top: top };
            },

            _snap: function (x, y) {
                var that = this,
                    i, l,
                    page, time,
                    sizeX, sizeY;

                // Check page X
                page = that.pagesX.length - 1;
                for (i = 0, l = that.pagesX.length; i < l; i++) {
                    if (x >= that.pagesX[i]) {
                        page = i;
                        break;
                    }
                }
                if (page == that.currPageX && page > 0 && that.dirX < 0) page--;
                x = that.pagesX[page];
                sizeX = m.abs(x - that.pagesX[that.currPageX]);
                sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;
                that.currPageX = page;

                // Check page Y
                page = that.pagesY.length - 1;
                for (i = 0; i < page; i++) {
                    if (y >= that.pagesY[i]) {
                        page = i;
                        break;
                    }
                }
                if (page == that.currPageY && page > 0 && that.dirY < 0) page--;
                y = that.pagesY[page];
                sizeY = m.abs(y - that.pagesY[that.currPageY]);
                sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;
                that.currPageY = page;

                // Snap with constant speed (proportional duration)
                time = m.round(m.max(sizeX, sizeY)) || 200;

                return { x: x, y: y, time: time };
            },

            _bind: function (type, el, bubble) {
                (el || this.scroller).addEventListener(type, this, !!bubble);
            },

            _unbind: function (type, el, bubble) {
                (el || this.scroller).removeEventListener(type, this, !!bubble);
            },


            /**
             *
             * Public methods
             *
             */
            destroy: function () {
                var that = this;

                that.scroller.style[transform] = '';

                // Remove the scrollbars
                that.hScrollbar = false;
                that.vScrollbar = false;
                that._scrollbar('h');
                that._scrollbar('v');

                // Remove the event listeners
                that._unbind(RESIZE_EV, window);
                that._unbind(START_EV);
                that._unbind(MOVE_EV, window);
                that._unbind(END_EV, window);
                that._unbind(CANCEL_EV, window);

                if (!that.options.hasTouch) {
                    that._unbind('DOMMouseScroll');
                    that._unbind('mousewheel');
                }

                if (that.options.useTransition) that._unbind(TRNEND_EV);

                if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime);

                if (that.options.onDestroy) that.options.onDestroy.call(that);
            },

            refresh: function () {
                var that = this,
                    offset,
                    i, l,
                    els,
                    pos = 0,
                    page = 0;

                if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin;
                that.wrapperW = that.wrapper.clientWidth || 1;
                that.wrapperH = that.wrapper.clientHeight || 1;

                that.minScrollY = -that.options.topOffset || 0;
                that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);
                that.scrollerH = m.round((that.scroller.offsetHeight + that.minScrollY) * that.scale);
                that.maxScrollX = that.wrapperW - that.scrollerW;
                that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;
                that.dirX = 0;
                that.dirY = 0;

                if (that.options.onRefresh) that.options.onRefresh.call(that);

                that.hScroll = that.options.hScroll && that.maxScrollX < 0;
                that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);

                that.hScrollbar = that.hScroll && that.options.hScrollbar;
                that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;

                offset = that._offset(that.wrapper);
                that.wrapperOffsetLeft = -offset.left;
                that.wrapperOffsetTop = -offset.top;

                // Prepare snap
                if (typeof that.options.snap == 'string') {
                    that.pagesX = [];
                    that.pagesY = [];
                    els = that.scroller.querySelectorAll(that.options.snap);
                    for (i = 0, l = els.length; i < l; i++) {
                        pos = that._offset(els[i]);
                        pos.left += that.wrapperOffsetLeft;
                        pos.top += that.wrapperOffsetTop;
                        that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;
                        that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;
                    }
                } else if (that.options.snap) {
                    that.pagesX = [];
                    while (pos >= that.maxScrollX) {
                        that.pagesX[page] = pos;
                        pos = pos - that.wrapperW;
                        page++;
                    }
                    if (that.maxScrollX % that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length - 1] + that.pagesX[that.pagesX.length - 1];

                    pos = 0;
                    page = 0;
                    that.pagesY = [];
                    while (pos >= that.maxScrollY) {
                        that.pagesY[page] = pos;
                        pos = pos - that.wrapperH;
                        page++;
                    }
                    if (that.maxScrollY % that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length - 1] + that.pagesY[that.pagesY.length - 1];
                }

                // Prepare the scrollbars
                that._scrollbar('h');
                that._scrollbar('v');

                if (!that.zoomed) {
                    that.scroller.style[transitionDuration] = '0';
                    that._resetPos(400);
                }
            },

            scrollTo: function (x, y, time, relative) {
                var that = this,
                    step = x,
                    i, l;

                that.stop();

                if (!step.length) step = [
                    { x: x, y: y, time: time, relative: relative }
                ];

                for (i = 0, l = step.length; i < l; i++) {
                    if (step[i].relative) {
                        step[i].x = that.x - step[i].x;
                        step[i].y = that.y - step[i].y;
                    }
                    that.steps.push({ x: step[i].x, y: step[i].y, time: step[i].time || 0 });
                }

                that._startAni();
            },

            scrollToElement: function (el, time) {
                var that = this, pos;
                el = el.nodeType ? el : that.scroller.querySelector(el);
                if (!el) return;

                pos = that._offset(el);
                pos.left += that.wrapperOffsetLeft;
                pos.top += that.wrapperOffsetTop;

                pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
                pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
                time = time === undefined ? m.max(m.abs(pos.left) * 2, m.abs(pos.top) * 2) : time;

                that.scrollTo(pos.left, pos.top, time);
            },

            scrollToPage: function (pageX, pageY, time) {
                var that = this, x, y;

                time = time === undefined ? 400 : time;

                if (that.options.onScrollStart) that.options.onScrollStart.call(that);

                if (that.options.snap) {
                    pageX = pageX == 'next' ? that.currPageX + 1 : pageX == 'prev' ? that.currPageX - 1 : pageX;
                    pageY = pageY == 'next' ? that.currPageY + 1 : pageY == 'prev' ? that.currPageY - 1 : pageY;

                    pageX = pageX < 0 ? 0 : pageX > that.pagesX.length - 1 ? that.pagesX.length - 1 : pageX;
                    pageY = pageY < 0 ? 0 : pageY > that.pagesY.length - 1 ? that.pagesY.length - 1 : pageY;

                    that.currPageX = pageX;
                    that.currPageY = pageY;
                    x = that.pagesX[pageX];
                    y = that.pagesY[pageY];
                } else {
                    x = -that.wrapperW * pageX;
                    y = -that.wrapperH * pageY;
                    if (x < that.maxScrollX) x = that.maxScrollX;
                    if (y < that.maxScrollY) y = that.maxScrollY;
                }

                that.scrollTo(x, y, time);
            },

            disable: function () {
                this.stop();
                this._resetPos(0);
                this.enabled = false;

                // If disabled after touchstart we make sure that there are no left over events
                this._unbind(MOVE_EV, window);
                this._unbind(END_EV, window);
                this._unbind(CANCEL_EV, window);
            },

            enable: function () {
                this.enabled = true;
            },

            stop: function () {
                if (this.options.useTransition) this._unbind(TRNEND_EV);
                else cancelFrame(this.aniTime);
                this.steps = [];
                this.moved = false;
                this.animating = false;
            },

            zoom: function (x, y, scale, time) {
                var that = this,
                    relScale = scale / that.scale;

                if (!that.options.useTransform) return;

                that.zoomed = true;
                time = time === undefined ? 200 : time;
                x = x - that.wrapperOffsetLeft - that.x;
                y = y - that.wrapperOffsetTop - that.y;
                that.x = x - x * relScale + that.x;
                that.y = y - y * relScale + that.y;

                that.scale = scale;
                that.refresh();

                that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;
                that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;

                that.scroller.style[transitionDuration] = time + 'ms';
                that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px) scale(' + scale + ')' + translateZ;
                that.zoomed = false;
            },

            isReady: function () {
                return !this.moved && !this.zoomed && !this.animating;
            }
        };

        function prefixStyle(style) {
            if (vendor === '') return style;

            style = style.charAt(0).toUpperCase() + style.substr(1);
            return vendor + style;
        }

        dummyStyle = null;	// for the sake of it

        if (typeof exports !== 'undefined'&& module.exports) module.exports = iScroll;
			else window.iScroll = iScroll;
			
		
    })(window, document);
});
